Check-rower



(No Model.)

A. W. THOMPSON.

I GHBGK ROWBR. No. 277,856. Patented May 15,1883.

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" daezw n PETERS, mom-umoin m. wuninmn. 0v 1:

ASA w. THOMPSON, or MONMOUTH,

PATENT OFFICE.

ILLINOIS, ASSIGNOl-t TO THOMPSON,

MoOULLO-UGH & COMPANY, or ILLINOIS.

CH ECK-ROWER.

SPECIFICATION forming part of Letters PatentNo. 277,856, dated May 15,1888, Application filed October 9, 1882. (l lo model.)

appertains to make and use the same, reference being had to theaccompanying drawings, which form a part of this specification, and inwhich- Figure l is a perspective view of my improved check-rowmechanism. Fig. 2 is a de-' 1 tail view of the cam and seed-slideoperating mechanism; and Fig. 3 is a side view, partly in section, ofthesame on line :r m, Fig. 2.

Similar letters of reference indicate corresponding parts in all thefigures.

2o Myinvcntion has relation to check-row mechanism for corn-planters;and it consists in the improved construction and combination -of partsof the same, as hereinafter more fully described and claimed.

In the accompanying drawings, the letter A. indicates part of theplanter-frame, upon the ends of which two cross-pieces, B, are secured,which form bearings for the shaft 0 of the check mechanism. This shaftis'provided at both ends with two disks, D, having four slotted orbifurcated arms, E, at right angles to each other, through which theknotted check rope or wire passes, the slots being of a sufficient widthto allow the checkrope to pass 5 freely through them, while preventingthe knots from passing, so that as the machine is propelled across thefield the knots upon the rope will bear against the edges of the slottedarms, tilting them over until they occupy a 40 horizontal position,allowing the knots to slide along the edges and pass out at the rear ofthe machine, the shaft making one-fourth of a revolution for each knot.

A cam, F, is fastened upon the central por- 5 tion of the shaft 0, andconsists of a cylindrical body, Gr, the end of which is cut out to formtwo diametrically-opposite projections,

H, and two depressions, I, and a plate, J, bent to conform to the shapeof the end of the cylinder, forming awaved channel, K, the ex- [tremecurvatures of which lie in the same planes as the arms E.

L is the seed-slide, which slides in ways in the frame, and has fastenedupon its upper surface an upright lug, M, slotted at its upper 5 end,into which slot the pin N of a crank. 0, projects and slides, so thatwhen the crank is rocked the pin will slide in the slot of the lug M,and at the same time slide bar L forward and back. This crank O isfastened to the end of a rock-shaft, P, rocking in a bearing fastened tothe frame, and having upon its other end an arm, Q, which projects upinto the channel K of the cam. Upon the upper end ofthis arm Q, is apear-shaped cam, R, 6

journaled upon a pin, S, inserted into the end of said arm Q, and theshape of which knob, tapering upward, admits of its rocking in thechannel K, and turning when coming in contact with either side of thechannel when the shaft and cam are revolved.

In the end of the cylindrical part of the cam is. cut a ratchet-shapedgroove, T, consisting of four straight radial portions, U, facing in thedirection in which the cam revolves, alternating with four curvedeccentric portions, V, all connecting with each other at their inner andouter ends, forming one continuous groove,

the outer ends or points of the same being in the same planes with theextreme points and depressions of the cam.

A pin,W, projecting laterally from the outer end of a gravitating arm,X, pivoted upon the frame, extends into groove T, and slides in the sameas the shaft is revolved, and it will be 8 5 seen that as a knot uponthe check-rope comes in contact with-and bears against the edge of oneof the bifurcated arms, turning it onefourth revolution, the pin W willslide from the outer end of one of the curved portions of the grooveintothe inner corner of the same, bearing against the inner end of thestraight portion and stopping the revolution of the shaft. As, now, theknotslides along the edge of the horizontally-tilted arm and off fromit, 5 the gravity of the arm, aided by a spring, Y, engaging its outerend and fastened to the frame, will cause it to drop, the pin slidingdownward in the straightportion of the groove, which at that, time is ina vertical position, [00

bringing thepin into the point of the grooves, allowingthe cam to makeanother one-fourth revolution, and so on in the same manner.

Lam aware that cams having zigzag-shaped grooves in their faces havebeen used for converting rotary to reciprocating motion in checkrowersand in other machinery, and I do not claim such a cam,'broadly; but

What I claim, and desire to secure by Letters Patent, is

1. In a check-rower, the combination of the cam F, consisting of thecylindrical body G,

fastened upon the revolving shaft, cut'at one end to form curved pointsH and hollows I alternately, and plate J, fastened upon the shaft, andbent to correspond with the end of body G, forming channel K, with therock-- shaft P, having arm Q, projecting into channel K at one end, andarm 0 at the other end, operating the seed-slides, as and for thepurpose shown and set forth.

2. Thelocking or stop-motion mechanism in a check-rower, consisting ofthe ratchet-shaped groove T, cut into the flat'side of a vdisk orcylinder fastened upon the revolving shaft, and consisting of straightradial portions U and curved eccentric portions V, forming a number ofpoints corresponding to the number of part revolutions of the shaft, andthe pivoted gravitating arm X, having laterally-extending pin W,traveling in groove T, as and for the purpose shown and set forth.

3. The combination of the cam F, having ratchet-shaped groove 1 upon itsflat side, with the gravitating arm X, pivoted upon the frame, andhaving laterally-projecting pin W and spring Y, as and for the purposeshown and set forth.

4c. The combination of the shaft (J, disks D, having bifurcated arms E,cam F, having channel K and ratchet-shaped groove T,rock-shaft 1 havingarm Q, projecting into channel K, and seed-slide operating arm 0, andgravitating arm X, having laterally-projecting pin W and spring Y, asand for the purpose shown and set forth.

5. As an improvement in check-rowers, the combination of the knottedcheck rope or wire, disk D, having bifurcated arms E, shaft U, cam F,having channel K, pear-shaped knob R, arm Q, rock-shaft 1?, arm 0,slotted lug M, slide L, ratchetshaped groove '1, gravitating arm X,having pin W and spring Y, a ll constructed tooperate in the manner andfor the purpose shown and set forth.

ASA V. THOMPSON.

Witnesses:

H. A. STODDARD, J. W. GRAHAM.

